The following procedures describe how to create a silent installation. A silent installation requires no user interaction after the installation starts. You cannot perform a silent rollback of an upgrade installation for BIRT iHub. You modify the template file that contains all input parameters for the installation. This file contains all user information the installation shell script requires. The entries in the template are default values for an installation. Change the default values to configure the silent installation. During the installation, the installation shell script file reads the parameter file. The parameter template files and the installation shell script files are located at the root level of the Actuate product installation directory. The names for the parameter template files and the installation shell script files for BIRT iHub and BIRT iHub Integration Technology appear in Table 16‑2.